Worth mentioning though is that they didn't invent Common Core Standards; they support it. Common Core was also preceded by No Child Left Behind, which shifted emphasis in education in a similar war.

All that is to say that the issue didn't originate with the Gates Foundation. It goes much deeper and is arguably a broad societal issue. No one agrees on how teaching should be done, there's insufficient coordination, people doing the work lack resources and incentive, and kids suffer a lot as a result.

Pretty sure that was a part of No Child Left Behind, years before Common Core. I'm also not sure how development of a set of tests and standards would be related to teacher employment - I would have expected that to be up to the states and how they implement them.